This image shows bright and dark patterns with curving boundaries , a good example of Mars art. What caused this appearance?
This region of Echus Chasma has been flooded by lava flows that produced rough and smooth surfaces. The rough areas then trap bright dust, creating the contrasts in brightness.
Written by: Alfred McEwen (audio: Tre Gibbs) (9 December 2015)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_042835_1800
Image: NASA/JPL/University of Arizona